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Diffstat (limited to 'contrib/llvm/tools/clang/lib/Sema/SemaDeclObjC.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/Sema/SemaDeclObjC.cpp | 1859 |
1 files changed, 1859 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Sema/SemaDeclObjC.cpp b/contrib/llvm/tools/clang/lib/Sema/SemaDeclObjC.cpp new file mode 100644 index 0000000..3b05f5a --- /dev/null +++ b/contrib/llvm/tools/clang/lib/Sema/SemaDeclObjC.cpp @@ -0,0 +1,1859 @@ +//===--- SemaDeclObjC.cpp - Semantic Analysis for ObjC Declarations -------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements semantic analysis for Objective C declarations. +// +//===----------------------------------------------------------------------===// + +#include "Sema.h" +#include "Lookup.h" +#include "clang/Sema/ExternalSemaSource.h" +#include "clang/AST/Expr.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/DeclObjC.h" +#include "clang/Parse/DeclSpec.h" +using namespace clang; + +/// ActOnStartOfObjCMethodDef - This routine sets up parameters; invisible +/// and user declared, in the method definition's AST. +void Sema::ActOnStartOfObjCMethodDef(Scope *FnBodyScope, DeclPtrTy D) { + assert(getCurMethodDecl() == 0 && "Method parsing confused"); + ObjCMethodDecl *MDecl = dyn_cast_or_null<ObjCMethodDecl>(D.getAs<Decl>()); + + // If we don't have a valid method decl, simply return. + if (!MDecl) + return; + + // Allow the rest of sema to find private method decl implementations. + if (MDecl->isInstanceMethod()) + AddInstanceMethodToGlobalPool(MDecl); + else + AddFactoryMethodToGlobalPool(MDecl); + + // Allow all of Sema to see that we are entering a method definition. + PushDeclContext(FnBodyScope, MDecl); + PushFunctionScope(); + + // Create Decl objects for each parameter, entrring them in the scope for + // binding to their use. + + // Insert the invisible arguments, self and _cmd! + MDecl->createImplicitParams(Context, MDecl->getClassInterface()); + + PushOnScopeChains(MDecl->getSelfDecl(), FnBodyScope); + PushOnScopeChains(MDecl->getCmdDecl(), FnBodyScope); + + // Introduce all of the other parameters into this scope. + for (ObjCMethodDecl::param_iterator PI = MDecl->param_begin(), + E = MDecl->param_end(); PI != E; ++PI) + if ((*PI)->getIdentifier()) + PushOnScopeChains(*PI, FnBodyScope); +} + +Sema::DeclPtrTy Sema:: +ActOnStartClassInterface(SourceLocation AtInterfaceLoc, + IdentifierInfo *ClassName, SourceLocation ClassLoc, + IdentifierInfo *SuperName, SourceLocation SuperLoc, + const DeclPtrTy *ProtoRefs, unsigned NumProtoRefs, + const SourceLocation *ProtoLocs, + SourceLocation EndProtoLoc, AttributeList *AttrList) { + assert(ClassName && "Missing class identifier"); + + // Check for another declaration kind with the same name. + NamedDecl *PrevDecl = LookupSingleName(TUScope, ClassName, ClassLoc, + LookupOrdinaryName, ForRedeclaration); + + if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { + Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName; + Diag(PrevDecl->getLocation(), diag::note_previous_definition); + } + + ObjCInterfaceDecl* IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); + if (IDecl) { + // Class already seen. Is it a forward declaration? + if (!IDecl->isForwardDecl()) { + IDecl->setInvalidDecl(); + Diag(AtInterfaceLoc, diag::err_duplicate_class_def)<<IDecl->getDeclName(); + Diag(IDecl->getLocation(), diag::note_previous_definition); + + // Return the previous class interface. + // FIXME: don't leak the objects passed in! + return DeclPtrTy::make(IDecl); + } else { + IDecl->setLocation(AtInterfaceLoc); + IDecl->setForwardDecl(false); + IDecl->setClassLoc(ClassLoc); + + // Since this ObjCInterfaceDecl was created by a forward declaration, + // we now add it to the DeclContext since it wasn't added before + // (see ActOnForwardClassDeclaration). + IDecl->setLexicalDeclContext(CurContext); + CurContext->addDecl(IDecl); + + if (AttrList) + ProcessDeclAttributeList(TUScope, IDecl, AttrList); + } + } else { + IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtInterfaceLoc, + ClassName, ClassLoc); + if (AttrList) + ProcessDeclAttributeList(TUScope, IDecl, AttrList); + + PushOnScopeChains(IDecl, TUScope); + } + + if (SuperName) { + // Check if a different kind of symbol declared in this scope. + PrevDecl = LookupSingleName(TUScope, SuperName, SuperLoc, + LookupOrdinaryName); + + if (!PrevDecl) { + // Try to correct for a typo in the superclass name. + LookupResult R(*this, SuperName, SuperLoc, LookupOrdinaryName); + if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) && + (PrevDecl = R.getAsSingle<ObjCInterfaceDecl>())) { + Diag(SuperLoc, diag::err_undef_superclass_suggest) + << SuperName << ClassName << PrevDecl->getDeclName(); + Diag(PrevDecl->getLocation(), diag::note_previous_decl) + << PrevDecl->getDeclName(); + } + } + + if (PrevDecl == IDecl) { + Diag(SuperLoc, diag::err_recursive_superclass) + << SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc); + IDecl->setLocEnd(ClassLoc); + } else { + ObjCInterfaceDecl *SuperClassDecl = + dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); + + // Diagnose classes that inherit from deprecated classes. + if (SuperClassDecl) + (void)DiagnoseUseOfDecl(SuperClassDecl, SuperLoc); + + if (PrevDecl && SuperClassDecl == 0) { + // The previous declaration was not a class decl. Check if we have a + // typedef. If we do, get the underlying class type. + if (const TypedefDecl *TDecl = dyn_cast_or_null<TypedefDecl>(PrevDecl)) { + QualType T = TDecl->getUnderlyingType(); + if (T->isObjCObjectType()) { + if (NamedDecl *IDecl = T->getAs<ObjCObjectType>()->getInterface()) + SuperClassDecl = dyn_cast<ObjCInterfaceDecl>(IDecl); + } + } + + // This handles the following case: + // + // typedef int SuperClass; + // @interface MyClass : SuperClass {} @end + // + if (!SuperClassDecl) { + Diag(SuperLoc, diag::err_redefinition_different_kind) << SuperName; + Diag(PrevDecl->getLocation(), diag::note_previous_definition); + } + } + + if (!dyn_cast_or_null<TypedefDecl>(PrevDecl)) { + if (!SuperClassDecl) + Diag(SuperLoc, diag::err_undef_superclass) + << SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc); + else if (SuperClassDecl->isForwardDecl()) + Diag(SuperLoc, diag::err_undef_superclass) + << SuperClassDecl->getDeclName() << ClassName + << SourceRange(AtInterfaceLoc, ClassLoc); + } + IDecl->setSuperClass(SuperClassDecl); + IDecl->setSuperClassLoc(SuperLoc); + IDecl->setLocEnd(SuperLoc); + } + } else { // we have a root class. + IDecl->setLocEnd(ClassLoc); + } + + /// Check then save referenced protocols. + if (NumProtoRefs) { + IDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs, + ProtoLocs, Context); + IDecl->setLocEnd(EndProtoLoc); + } + + CheckObjCDeclScope(IDecl); + return DeclPtrTy::make(IDecl); +} + +/// ActOnCompatiblityAlias - this action is called after complete parsing of +/// @compatibility_alias declaration. It sets up the alias relationships. +Sema::DeclPtrTy Sema::ActOnCompatiblityAlias(SourceLocation AtLoc, + IdentifierInfo *AliasName, + SourceLocation AliasLocation, + IdentifierInfo *ClassName, + SourceLocation ClassLocation) { + // Look for previous declaration of alias name + NamedDecl *ADecl = LookupSingleName(TUScope, AliasName, AliasLocation, + LookupOrdinaryName, ForRedeclaration); + if (ADecl) { + if (isa<ObjCCompatibleAliasDecl>(ADecl)) + Diag(AliasLocation, diag::warn_previous_alias_decl); + else + Diag(AliasLocation, diag::err_conflicting_aliasing_type) << AliasName; + Diag(ADecl->getLocation(), diag::note_previous_declaration); + return DeclPtrTy(); + } + // Check for class declaration + NamedDecl *CDeclU = LookupSingleName(TUScope, ClassName, ClassLocation, + LookupOrdinaryName, ForRedeclaration); + if (const TypedefDecl *TDecl = dyn_cast_or_null<TypedefDecl>(CDeclU)) { + QualType T = TDecl->getUnderlyingType(); + if (T->isObjCObjectType()) { + if (NamedDecl *IDecl = T->getAs<ObjCObjectType>()->getInterface()) { + ClassName = IDecl->getIdentifier(); + CDeclU = LookupSingleName(TUScope, ClassName, ClassLocation, + LookupOrdinaryName, ForRedeclaration); + } + } + } + ObjCInterfaceDecl *CDecl = dyn_cast_or_null<ObjCInterfaceDecl>(CDeclU); + if (CDecl == 0) { + Diag(ClassLocation, diag::warn_undef_interface) << ClassName; + if (CDeclU) + Diag(CDeclU->getLocation(), diag::note_previous_declaration); + return DeclPtrTy(); + } + + // Everything checked out, instantiate a new alias declaration AST. + ObjCCompatibleAliasDecl *AliasDecl = + ObjCCompatibleAliasDecl::Create(Context, CurContext, AtLoc, AliasName, CDecl); + + if (!CheckObjCDeclScope(AliasDecl)) + PushOnScopeChains(AliasDecl, TUScope); + + return DeclPtrTy::make(AliasDecl); +} + +void Sema::CheckForwardProtocolDeclarationForCircularDependency( + IdentifierInfo *PName, + SourceLocation &Ploc, SourceLocation PrevLoc, + const ObjCList<ObjCProtocolDecl> &PList) { + for (ObjCList<ObjCProtocolDecl>::iterator I = PList.begin(), + E = PList.end(); I != E; ++I) { + + if (ObjCProtocolDecl *PDecl = LookupProtocol((*I)->getIdentifier(), + Ploc)) { + if (PDecl->getIdentifier() == PName) { + Diag(Ploc, diag::err_protocol_has_circular_dependency); + Diag(PrevLoc, diag::note_previous_definition); + } + CheckForwardProtocolDeclarationForCircularDependency(PName, Ploc, + PDecl->getLocation(), PDecl->getReferencedProtocols()); + } + } +} + +Sema::DeclPtrTy +Sema::ActOnStartProtocolInterface(SourceLocation AtProtoInterfaceLoc, + IdentifierInfo *ProtocolName, + SourceLocation ProtocolLoc, + const DeclPtrTy *ProtoRefs, + unsigned NumProtoRefs, + const SourceLocation *ProtoLocs, + SourceLocation EndProtoLoc, + AttributeList *AttrList) { + // FIXME: Deal with AttrList. + assert(ProtocolName && "Missing protocol identifier"); + ObjCProtocolDecl *PDecl = LookupProtocol(ProtocolName, ProtocolLoc); + if (PDecl) { + // Protocol already seen. Better be a forward protocol declaration + if (!PDecl->isForwardDecl()) { + Diag(ProtocolLoc, diag::warn_duplicate_protocol_def) << ProtocolName; + Diag(PDecl->getLocation(), diag::note_previous_definition); + // Just return the protocol we already had. + // FIXME: don't leak the objects passed in! + return DeclPtrTy::make(PDecl); + } + ObjCList<ObjCProtocolDecl> PList; + PList.set((ObjCProtocolDecl *const*)ProtoRefs, NumProtoRefs, Context); + CheckForwardProtocolDeclarationForCircularDependency( + ProtocolName, ProtocolLoc, PDecl->getLocation(), PList); + PList.Destroy(Context); + + // Make sure the cached decl gets a valid start location. + PDecl->setLocation(AtProtoInterfaceLoc); + PDecl->setForwardDecl(false); + } else { + PDecl = ObjCProtocolDecl::Create(Context, CurContext, + AtProtoInterfaceLoc,ProtocolName); + PushOnScopeChains(PDecl, TUScope); + PDecl->setForwardDecl(false); + } + if (AttrList) + ProcessDeclAttributeList(TUScope, PDecl, AttrList); + if (NumProtoRefs) { + /// Check then save referenced protocols. + PDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs, + ProtoLocs, Context); + PDecl->setLocEnd(EndProtoLoc); + } + + CheckObjCDeclScope(PDecl); + return DeclPtrTy::make(PDecl); +} + +/// FindProtocolDeclaration - This routine looks up protocols and +/// issues an error if they are not declared. It returns list of +/// protocol declarations in its 'Protocols' argument. +void +Sema::FindProtocolDeclaration(bool WarnOnDeclarations, + const IdentifierLocPair *ProtocolId, + unsigned NumProtocols, + llvm::SmallVectorImpl<DeclPtrTy> &Protocols) { + for (unsigned i = 0; i != NumProtocols; ++i) { + ObjCProtocolDecl *PDecl = LookupProtocol(ProtocolId[i].first, + ProtocolId[i].second); + if (!PDecl) { + LookupResult R(*this, ProtocolId[i].first, ProtocolId[i].second, + LookupObjCProtocolName); + if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) && + (PDecl = R.getAsSingle<ObjCProtocolDecl>())) { + Diag(ProtocolId[i].second, diag::err_undeclared_protocol_suggest) + << ProtocolId[i].first << R.getLookupName(); + Diag(PDecl->getLocation(), diag::note_previous_decl) + << PDecl->getDeclName(); + } + } + + if (!PDecl) { + Diag(ProtocolId[i].second, diag::err_undeclared_protocol) + << ProtocolId[i].first; + continue; + } + + (void)DiagnoseUseOfDecl(PDecl, ProtocolId[i].second); + + // If this is a forward declaration and we are supposed to warn in this + // case, do it. + if (WarnOnDeclarations && PDecl->isForwardDecl()) + Diag(ProtocolId[i].second, diag::warn_undef_protocolref) + << ProtocolId[i].first; + Protocols.push_back(DeclPtrTy::make(PDecl)); + } +} + +/// DiagnoseClassExtensionDupMethods - Check for duplicate declaration of +/// a class method in its extension. +/// +void Sema::DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, + ObjCInterfaceDecl *ID) { + if (!ID) + return; // Possibly due to previous error + + llvm::DenseMap<Selector, const ObjCMethodDecl*> MethodMap; + for (ObjCInterfaceDecl::method_iterator i = ID->meth_begin(), + e = ID->meth_end(); i != e; ++i) { + ObjCMethodDecl *MD = *i; + MethodMap[MD->getSelector()] = MD; + } + + if (MethodMap.empty()) + return; + for (ObjCCategoryDecl::method_iterator i = CAT->meth_begin(), + e = CAT->meth_end(); i != e; ++i) { + ObjCMethodDecl *Method = *i; + const ObjCMethodDecl *&PrevMethod = MethodMap[Method->getSelector()]; + if (PrevMethod && !MatchTwoMethodDeclarations(Method, PrevMethod)) { + Diag(Method->getLocation(), diag::err_duplicate_method_decl) + << Method->getDeclName(); + Diag(PrevMethod->getLocation(), diag::note_previous_declaration); + } + } +} + +/// ActOnForwardProtocolDeclaration - Handle @protocol foo; +Action::DeclPtrTy +Sema::ActOnForwardProtocolDeclaration(SourceLocation AtProtocolLoc, + const IdentifierLocPair *IdentList, + unsigned NumElts, + AttributeList *attrList) { + llvm::SmallVector<ObjCProtocolDecl*, 32> Protocols; + llvm::SmallVector<SourceLocation, 8> ProtoLocs; + + for (unsigned i = 0; i != NumElts; ++i) { + IdentifierInfo *Ident = IdentList[i].first; + ObjCProtocolDecl *PDecl = LookupProtocol(Ident, IdentList[i].second); + if (PDecl == 0) { // Not already seen? + PDecl = ObjCProtocolDecl::Create(Context, CurContext, + IdentList[i].second, Ident); + PushOnScopeChains(PDecl, TUScope); + } + if (attrList) + ProcessDeclAttributeList(TUScope, PDecl, attrList); + Protocols.push_back(PDecl); + ProtoLocs.push_back(IdentList[i].second); + } + + ObjCForwardProtocolDecl *PDecl = + ObjCForwardProtocolDecl::Create(Context, CurContext, AtProtocolLoc, + Protocols.data(), Protocols.size(), + ProtoLocs.data()); + CurContext->addDecl(PDecl); + CheckObjCDeclScope(PDecl); + return DeclPtrTy::make(PDecl); +} + +Sema::DeclPtrTy Sema:: +ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, + IdentifierInfo *ClassName, SourceLocation ClassLoc, + IdentifierInfo *CategoryName, + SourceLocation CategoryLoc, + const DeclPtrTy *ProtoRefs, + unsigned NumProtoRefs, + const SourceLocation *ProtoLocs, + SourceLocation EndProtoLoc) { + ObjCCategoryDecl *CDecl = 0; + ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName, ClassLoc, true); + + /// Check that class of this category is already completely declared. + if (!IDecl || IDecl->isForwardDecl()) { + // Create an invalid ObjCCategoryDecl to serve as context for + // the enclosing method declarations. We mark the decl invalid + // to make it clear that this isn't a valid AST. + CDecl = ObjCCategoryDecl::Create(Context, CurContext, AtInterfaceLoc, + ClassLoc, CategoryLoc, CategoryName); + CDecl->setInvalidDecl(); + Diag(ClassLoc, diag::err_undef_interface) << ClassName; + return DeclPtrTy::make(CDecl); + } + + if (!CategoryName) { + // Class extensions require a special treatment. Use an existing one. + // Note that 'getClassExtension()' can return NULL. + CDecl = IDecl->getClassExtension(); + if (IDecl->getImplementation()) { + Diag(ClassLoc, diag::err_class_extension_after_impl) << ClassName; + Diag(IDecl->getImplementation()->getLocation(), + diag::note_implementation_declared); + } + } + + if (!CDecl) { + CDecl = ObjCCategoryDecl::Create(Context, CurContext, AtInterfaceLoc, + ClassLoc, CategoryLoc, CategoryName); + // FIXME: PushOnScopeChains? + CurContext->addDecl(CDecl); + + CDecl->setClassInterface(IDecl); + // Insert first use of class extension to the list of class's categories. + if (!CategoryName) + CDecl->insertNextClassCategory(); + } + + // If the interface is deprecated, warn about it. + (void)DiagnoseUseOfDecl(IDecl, ClassLoc); + + if (CategoryName) { + /// Check for duplicate interface declaration for this category + ObjCCategoryDecl *CDeclChain; + for (CDeclChain = IDecl->getCategoryList(); CDeclChain; + CDeclChain = CDeclChain->getNextClassCategory()) { + if (CDeclChain->getIdentifier() == CategoryName) { + // Class extensions can be declared multiple times. + Diag(CategoryLoc, diag::warn_dup_category_def) + << ClassName << CategoryName; + Diag(CDeclChain->getLocation(), diag::note_previous_definition); + break; + } + } + if (!CDeclChain) + CDecl->insertNextClassCategory(); + } + + if (NumProtoRefs) { + CDecl->setProtocolList((ObjCProtocolDecl**)ProtoRefs, NumProtoRefs, + ProtoLocs, Context); + // Protocols in the class extension belong to the class. + if (CDecl->IsClassExtension()) + IDecl->mergeClassExtensionProtocolList((ObjCProtocolDecl**)ProtoRefs, + NumProtoRefs, ProtoLocs, + Context); + } + + CheckObjCDeclScope(CDecl); + return DeclPtrTy::make(CDecl); +} + +/// ActOnStartCategoryImplementation - Perform semantic checks on the +/// category implementation declaration and build an ObjCCategoryImplDecl +/// object. +Sema::DeclPtrTy Sema::ActOnStartCategoryImplementation( + SourceLocation AtCatImplLoc, + IdentifierInfo *ClassName, SourceLocation ClassLoc, + IdentifierInfo *CatName, SourceLocation CatLoc) { + ObjCInterfaceDecl *IDecl = getObjCInterfaceDecl(ClassName, ClassLoc, true); + ObjCCategoryDecl *CatIDecl = 0; + if (IDecl) { + CatIDecl = IDecl->FindCategoryDeclaration(CatName); + if (!CatIDecl) { + // Category @implementation with no corresponding @interface. + // Create and install one. + CatIDecl = ObjCCategoryDecl::Create(Context, CurContext, SourceLocation(), + SourceLocation(), SourceLocation(), + CatName); + CatIDecl->setClassInterface(IDecl); + CatIDecl->insertNextClassCategory(); + } + } + + ObjCCategoryImplDecl *CDecl = + ObjCCategoryImplDecl::Create(Context, CurContext, AtCatImplLoc, CatName, + IDecl); + /// Check that class of this category is already completely declared. + if (!IDecl || IDecl->isForwardDecl()) + Diag(ClassLoc, diag::err_undef_interface) << ClassName; + + // FIXME: PushOnScopeChains? + CurContext->addDecl(CDecl); + + /// Check that CatName, category name, is not used in another implementation. + if (CatIDecl) { + if (CatIDecl->getImplementation()) { + Diag(ClassLoc, diag::err_dup_implementation_category) << ClassName + << CatName; + Diag(CatIDecl->getImplementation()->getLocation(), + diag::note_previous_definition); + } else + CatIDecl->setImplementation(CDecl); + } + + CheckObjCDeclScope(CDecl); + return DeclPtrTy::make(CDecl); +} + +Sema::DeclPtrTy Sema::ActOnStartClassImplementation( + SourceLocation AtClassImplLoc, + IdentifierInfo *ClassName, SourceLocation ClassLoc, + IdentifierInfo *SuperClassname, + SourceLocation SuperClassLoc) { + ObjCInterfaceDecl* IDecl = 0; + // Check for another declaration kind with the same name. + NamedDecl *PrevDecl + = LookupSingleName(TUScope, ClassName, ClassLoc, LookupOrdinaryName, + ForRedeclaration); + if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { + Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName; + Diag(PrevDecl->getLocation(), diag::note_previous_definition); + } else if ((IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl))) { + // If this is a forward declaration of an interface, warn. + if (IDecl->isForwardDecl()) { + Diag(ClassLoc, diag::warn_undef_interface) << ClassName; + IDecl = 0; + } + } else { + // We did not find anything with the name ClassName; try to correct for + // typos in the class name. + LookupResult R(*this, ClassName, ClassLoc, LookupOrdinaryName); + if (CorrectTypo(R, TUScope, 0, 0, false, CTC_NoKeywords) && + (IDecl = R.getAsSingle<ObjCInterfaceDecl>())) { + // Suggest the (potentially) correct interface name. However, put the + // fix-it hint itself in a separate note, since changing the name in + // the warning would make the fix-it change semantics.However, don't + // provide a code-modification hint or use the typo name for recovery, + // because this is just a warning. The program may actually be correct. + Diag(ClassLoc, diag::warn_undef_interface_suggest) + << ClassName << R.getLookupName(); + Diag(IDecl->getLocation(), diag::note_previous_decl) + << R.getLookupName() + << FixItHint::CreateReplacement(ClassLoc, + R.getLookupName().getAsString()); + IDecl = 0; + } else { + Diag(ClassLoc, diag::warn_undef_interface) << ClassName; + } + } + + // Check that super class name is valid class name + ObjCInterfaceDecl* SDecl = 0; + if (SuperClassname) { + // Check if a different kind of symbol declared in this scope. + PrevDecl = LookupSingleName(TUScope, SuperClassname, SuperClassLoc, + LookupOrdinaryName); + if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { + Diag(SuperClassLoc, diag::err_redefinition_different_kind) + << SuperClassname; + Diag(PrevDecl->getLocation(), diag::note_previous_definition); + } else { + SDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); + if (!SDecl) + Diag(SuperClassLoc, diag::err_undef_superclass) + << SuperClassname << ClassName; + else if (IDecl && IDecl->getSuperClass() != SDecl) { + // This implementation and its interface do not have the same + // super class. + Diag(SuperClassLoc, diag::err_conflicting_super_class) + << SDecl->getDeclName(); + Diag(SDecl->getLocation(), diag::note_previous_definition); + } + } + } + + if (!IDecl) { + // Legacy case of @implementation with no corresponding @interface. + // Build, chain & install the interface decl into the identifier. + + // FIXME: Do we support attributes on the @implementation? If so we should + // copy them over. + IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtClassImplLoc, + ClassName, ClassLoc, false, true); + IDecl->setSuperClass(SDecl); + IDecl->setLocEnd(ClassLoc); + + PushOnScopeChains(IDecl, TUScope); + } else { + // Mark the interface as being completed, even if it was just as + // @class ....; + // declaration; the user cannot reopen it. + IDecl->setForwardDecl(false); + } + + ObjCImplementationDecl* IMPDecl = + ObjCImplementationDecl::Create(Context, CurContext, AtClassImplLoc, + IDecl, SDecl); + + if (CheckObjCDeclScope(IMPDecl)) + return DeclPtrTy::make(IMPDecl); + + // Check that there is no duplicate implementation of this class. + if (IDecl->getImplementation()) { + // FIXME: Don't leak everything! + Diag(ClassLoc, diag::err_dup_implementation_class) << ClassName; + Diag(IDecl->getImplementation()->getLocation(), + diag::note_previous_definition); + } else { // add it to the list. + IDecl->setImplementation(IMPDecl); + PushOnScopeChains(IMPDecl, TUScope); + } + return DeclPtrTy::make(IMPDecl); +} + +void Sema::CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, + ObjCIvarDecl **ivars, unsigned numIvars, + SourceLocation RBrace) { + assert(ImpDecl && "missing implementation decl"); + ObjCInterfaceDecl* IDecl = ImpDecl->getClassInterface(); + if (!IDecl) + return; + /// Check case of non-existing @interface decl. + /// (legacy objective-c @implementation decl without an @interface decl). + /// Add implementations's ivar to the synthesize class's ivar list. + if (IDecl->isImplicitInterfaceDecl()) { + IDecl->setLocEnd(RBrace); + // Add ivar's to class's DeclContext. + for (unsigned i = 0, e = numIvars; i != e; ++i) { + ivars[i]->setLexicalDeclContext(ImpDecl); + IDecl->makeDeclVisibleInContext(ivars[i], false); + ImpDecl->addDecl(ivars[i]); + } + + return; + } + // If implementation has empty ivar list, just return. + if (numIvars == 0) + return; + + assert(ivars && "missing @implementation ivars"); + if (LangOpts.ObjCNonFragileABI2) { + if (ImpDecl->getSuperClass()) + Diag(ImpDecl->getLocation(), diag::warn_on_superclass_use); + for (unsigned i = 0; i < numIvars; i++) { + ObjCIvarDecl* ImplIvar = ivars[i]; + if (const ObjCIvarDecl *ClsIvar = + IDecl->getIvarDecl(ImplIvar->getIdentifier())) { + Diag(ImplIvar->getLocation(), diag::err_duplicate_ivar_declaration); + Diag(ClsIvar->getLocation(), diag::note_previous_definition); + continue; + } + // Instance ivar to Implementation's DeclContext. + ImplIvar->setLexicalDeclContext(ImpDecl); + IDecl->makeDeclVisibleInContext(ImplIvar, false); + ImpDecl->addDecl(ImplIvar); + } + return; + } + // Check interface's Ivar list against those in the implementation. + // names and types must match. + // + unsigned j = 0; + ObjCInterfaceDecl::ivar_iterator + IVI = IDecl->ivar_begin(), IVE = IDecl->ivar_end(); + for (; numIvars > 0 && IVI != IVE; ++IVI) { + ObjCIvarDecl* ImplIvar = ivars[j++]; + ObjCIvarDecl* ClsIvar = *IVI; + assert (ImplIvar && "missing implementation ivar"); + assert (ClsIvar && "missing class ivar"); + + // First, make sure the types match. + if (Context.getCanonicalType(ImplIvar->getType()) != + Context.getCanonicalType(ClsIvar->getType())) { + Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_type) + << ImplIvar->getIdentifier() + << ImplIvar->getType() << ClsIvar->getType(); + Diag(ClsIvar->getLocation(), diag::note_previous_definition); + } else if (ImplIvar->isBitField() && ClsIvar->isBitField()) { + Expr *ImplBitWidth = ImplIvar->getBitWidth(); + Expr *ClsBitWidth = ClsIvar->getBitWidth(); + if (ImplBitWidth->EvaluateAsInt(Context).getZExtValue() != + ClsBitWidth->EvaluateAsInt(Context).getZExtValue()) { + Diag(ImplBitWidth->getLocStart(), diag::err_conflicting_ivar_bitwidth) + << ImplIvar->getIdentifier(); + Diag(ClsBitWidth->getLocStart(), diag::note_previous_definition); + } + } + // Make sure the names are identical. + if (ImplIvar->getIdentifier() != ClsIvar->getIdentifier()) { + Diag(ImplIvar->getLocation(), diag::err_conflicting_ivar_name) + << ImplIvar->getIdentifier() << ClsIvar->getIdentifier(); + Diag(ClsIvar->getLocation(), diag::note_previous_definition); + } + --numIvars; + } + + if (numIvars > 0) + Diag(ivars[j]->getLocation(), diag::err_inconsistant_ivar_count); + else if (IVI != IVE) + Diag((*IVI)->getLocation(), diag::err_inconsistant_ivar_count); +} + +void Sema::WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, + bool &IncompleteImpl, unsigned DiagID) { + if (!IncompleteImpl) { + Diag(ImpLoc, diag::warn_incomplete_impl); + IncompleteImpl = true; + } + Diag(method->getLocation(), DiagID) + << method->getDeclName(); +} + +void Sema::WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethodDecl, + ObjCMethodDecl *IntfMethodDecl) { + if (!Context.typesAreCompatible(IntfMethodDecl->getResultType(), + ImpMethodDecl->getResultType()) && + !Context.QualifiedIdConformsQualifiedId(IntfMethodDecl->getResultType(), + ImpMethodDecl->getResultType())) { + Diag(ImpMethodDecl->getLocation(), diag::warn_conflicting_ret_types) + << ImpMethodDecl->getDeclName() << IntfMethodDecl->getResultType() + << ImpMethodDecl->getResultType(); + Diag(IntfMethodDecl->getLocation(), diag::note_previous_definition); + } + + for (ObjCMethodDecl::param_iterator IM = ImpMethodDecl->param_begin(), + IF = IntfMethodDecl->param_begin(), EM = ImpMethodDecl->param_end(); + IM != EM; ++IM, ++IF) { + QualType ParmDeclTy = (*IF)->getType().getUnqualifiedType(); + QualType ParmImpTy = (*IM)->getType().getUnqualifiedType(); + if (Context.typesAreCompatible(ParmDeclTy, ParmImpTy) || + Context.QualifiedIdConformsQualifiedId(ParmDeclTy, ParmImpTy)) + continue; + + Diag((*IM)->getLocation(), diag::warn_conflicting_param_types) + << ImpMethodDecl->getDeclName() << (*IF)->getType() + << (*IM)->getType(); + Diag((*IF)->getLocation(), diag::note_previous_definition); + } + if (ImpMethodDecl->isVariadic() != IntfMethodDecl->isVariadic()) { + Diag(ImpMethodDecl->getLocation(), diag::warn_conflicting_variadic); + Diag(IntfMethodDecl->getLocation(), diag::note_previous_declaration); + } +} + +/// FIXME: Type hierarchies in Objective-C can be deep. We could most likely +/// improve the efficiency of selector lookups and type checking by associating +/// with each protocol / interface / category the flattened instance tables. If +/// we used an immutable set to keep the table then it wouldn't add significant +/// memory cost and it would be handy for lookups. + +/// CheckProtocolMethodDefs - This routine checks unimplemented methods +/// Declared in protocol, and those referenced by it. +void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc, + ObjCProtocolDecl *PDecl, + bool& IncompleteImpl, + const llvm::DenseSet<Selector> &InsMap, + const llvm::DenseSet<Selector> &ClsMap, + ObjCContainerDecl *CDecl) { + ObjCInterfaceDecl *IDecl; + if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) + IDecl = C->getClassInterface(); + else + IDecl = dyn_cast<ObjCInterfaceDecl>(CDecl); + assert (IDecl && "CheckProtocolMethodDefs - IDecl is null"); + + ObjCInterfaceDecl *Super = IDecl->getSuperClass(); + ObjCInterfaceDecl *NSIDecl = 0; + if (getLangOptions().NeXTRuntime) { + // check to see if class implements forwardInvocation method and objects + // of this class are derived from 'NSProxy' so that to forward requests + // from one object to another. + // Under such conditions, which means that every method possible is + // implemented in the class, we should not issue "Method definition not + // found" warnings. + // FIXME: Use a general GetUnarySelector method for this. + IdentifierInfo* II = &Context.Idents.get("forwardInvocation"); + Selector fISelector = Context.Selectors.getSelector(1, &II); + if (InsMap.count(fISelector)) + // Is IDecl derived from 'NSProxy'? If so, no instance methods + // need be implemented in the implementation. + NSIDecl = IDecl->lookupInheritedClass(&Context.Idents.get("NSProxy")); + } + + // If a method lookup fails locally we still need to look and see if + // the method was implemented by a base class or an inherited + // protocol. This lookup is slow, but occurs rarely in correct code + // and otherwise would terminate in a warning. + + // check unimplemented instance methods. + if (!NSIDecl) + for (ObjCProtocolDecl::instmeth_iterator I = PDecl->instmeth_begin(), + E = PDecl->instmeth_end(); I != E; ++I) { + ObjCMethodDecl *method = *I; + if (method->getImplementationControl() != ObjCMethodDecl::Optional && + !method->isSynthesized() && !InsMap.count(method->getSelector()) && + (!Super || + !Super->lookupInstanceMethod(method->getSelector()))) { + // Ugly, but necessary. Method declared in protcol might have + // have been synthesized due to a property declared in the class which + // uses the protocol. + ObjCMethodDecl *MethodInClass = + IDecl->lookupInstanceMethod(method->getSelector()); + if (!MethodInClass || !MethodInClass->isSynthesized()) { + unsigned DIAG = diag::warn_unimplemented_protocol_method; + if (Diags.getDiagnosticLevel(DIAG) != Diagnostic::Ignored) { + WarnUndefinedMethod(ImpLoc, method, IncompleteImpl, DIAG); + Diag(CDecl->getLocation(), diag::note_required_for_protocol_at) + << PDecl->getDeclName(); + } + } + } + } + // check unimplemented class methods + for (ObjCProtocolDecl::classmeth_iterator + I = PDecl->classmeth_begin(), E = PDecl->classmeth_end(); + I != E; ++I) { + ObjCMethodDecl *method = *I; + if (method->getImplementationControl() != ObjCMethodDecl::Optional && + !ClsMap.count(method->getSelector()) && + (!Super || !Super->lookupClassMethod(method->getSelector()))) { + unsigned DIAG = diag::warn_unimplemented_protocol_method; + if (Diags.getDiagnosticLevel(DIAG) != Diagnostic::Ignored) { + WarnUndefinedMethod(ImpLoc, method, IncompleteImpl, DIAG); + Diag(IDecl->getLocation(), diag::note_required_for_protocol_at) << + PDecl->getDeclName(); + } + } + } + // Check on this protocols's referenced protocols, recursively. + for (ObjCProtocolDecl::protocol_iterator PI = PDecl->protocol_begin(), + E = PDecl->protocol_end(); PI != E; ++PI) + CheckProtocolMethodDefs(ImpLoc, *PI, IncompleteImpl, InsMap, ClsMap, IDecl); +} + +/// MatchAllMethodDeclarations - Check methods declaraed in interface or +/// or protocol against those declared in their implementations. +/// +void Sema::MatchAllMethodDeclarations(const llvm::DenseSet<Selector> &InsMap, + const llvm::DenseSet<Selector> &ClsMap, + llvm::DenseSet<Selector> &InsMapSeen, + llvm::DenseSet<Selector> &ClsMapSeen, + ObjCImplDecl* IMPDecl, + ObjCContainerDecl* CDecl, + bool &IncompleteImpl, + bool ImmediateClass) { + // Check and see if instance methods in class interface have been + // implemented in the implementation class. If so, their types match. + for (ObjCInterfaceDecl::instmeth_iterator I = CDecl->instmeth_begin(), + E = CDecl->instmeth_end(); I != E; ++I) { + if (InsMapSeen.count((*I)->getSelector())) + continue; + InsMapSeen.insert((*I)->getSelector()); + if (!(*I)->isSynthesized() && + !InsMap.count((*I)->getSelector())) { + if (ImmediateClass) + WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl, + diag::note_undef_method_impl); + continue; + } else { + ObjCMethodDecl *ImpMethodDecl = + IMPDecl->getInstanceMethod((*I)->getSelector()); + ObjCMethodDecl *IntfMethodDecl = + CDecl->getInstanceMethod((*I)->getSelector()); + assert(IntfMethodDecl && + "IntfMethodDecl is null in ImplMethodsVsClassMethods"); + // ImpMethodDecl may be null as in a @dynamic property. + if (ImpMethodDecl) + WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl); + } + } + + // Check and see if class methods in class interface have been + // implemented in the implementation class. If so, their types match. + for (ObjCInterfaceDecl::classmeth_iterator + I = CDecl->classmeth_begin(), E = CDecl->classmeth_end(); I != E; ++I) { + if (ClsMapSeen.count((*I)->getSelector())) + continue; + ClsMapSeen.insert((*I)->getSelector()); + if (!ClsMap.count((*I)->getSelector())) { + if (ImmediateClass) + WarnUndefinedMethod(IMPDecl->getLocation(), *I, IncompleteImpl, + diag::note_undef_method_impl); + } else { + ObjCMethodDecl *ImpMethodDecl = + IMPDecl->getClassMethod((*I)->getSelector()); + ObjCMethodDecl *IntfMethodDecl = + CDecl->getClassMethod((*I)->getSelector()); + WarnConflictingTypedMethods(ImpMethodDecl, IntfMethodDecl); + } + } + if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl> (CDecl)) { + // Check for any implementation of a methods declared in protocol. + for (ObjCInterfaceDecl::protocol_iterator PI = I->protocol_begin(), + E = I->protocol_end(); PI != E; ++PI) + MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen, + IMPDecl, + (*PI), IncompleteImpl, false); + if (I->getSuperClass()) + MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen, + IMPDecl, + I->getSuperClass(), IncompleteImpl, false); + } +} + +void Sema::ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, + ObjCContainerDecl* CDecl, + bool IncompleteImpl) { + llvm::DenseSet<Selector> InsMap; + // Check and see if instance methods in class interface have been + // implemented in the implementation class. + for (ObjCImplementationDecl::instmeth_iterator + I = IMPDecl->instmeth_begin(), E = IMPDecl->instmeth_end(); I!=E; ++I) + InsMap.insert((*I)->getSelector()); + + // Check and see if properties declared in the interface have either 1) + // an implementation or 2) there is a @synthesize/@dynamic implementation + // of the property in the @implementation. + if (isa<ObjCInterfaceDecl>(CDecl) && !LangOpts.ObjCNonFragileABI2) + DiagnoseUnimplementedProperties(S, IMPDecl, CDecl, InsMap); + + llvm::DenseSet<Selector> ClsMap; + for (ObjCImplementationDecl::classmeth_iterator + I = IMPDecl->classmeth_begin(), + E = IMPDecl->classmeth_end(); I != E; ++I) + ClsMap.insert((*I)->getSelector()); + + // Check for type conflict of methods declared in a class/protocol and + // its implementation; if any. + llvm::DenseSet<Selector> InsMapSeen, ClsMapSeen; + MatchAllMethodDeclarations(InsMap, ClsMap, InsMapSeen, ClsMapSeen, + IMPDecl, CDecl, + IncompleteImpl, true); + + // Check the protocol list for unimplemented methods in the @implementation + // class. + // Check and see if class methods in class interface have been + // implemented in the implementation class. + + if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl> (CDecl)) { + for (ObjCInterfaceDecl::protocol_iterator PI = I->protocol_begin(), + E = I->protocol_end(); PI != E; ++PI) + CheckProtocolMethodDefs(IMPDecl->getLocation(), *PI, IncompleteImpl, + InsMap, ClsMap, I); + // Check class extensions (unnamed categories) + for (ObjCCategoryDecl *Categories = I->getCategoryList(); + Categories; Categories = Categories->getNextClassCategory()) { + if (Categories->IsClassExtension()) { + ImplMethodsVsClassMethods(S, IMPDecl, Categories, IncompleteImpl); + break; + } + } + } else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(CDecl)) { + // For extended class, unimplemented methods in its protocols will + // be reported in the primary class. + if (!C->IsClassExtension()) { + for (ObjCCategoryDecl::protocol_iterator PI = C->protocol_begin(), + E = C->protocol_end(); PI != E; ++PI) + CheckProtocolMethodDefs(IMPDecl->getLocation(), *PI, IncompleteImpl, + InsMap, ClsMap, CDecl); + // Report unimplemented properties in the category as well. + // When reporting on missing setter/getters, do not report when + // setter/getter is implemented in category's primary class + // implementation. + if (ObjCInterfaceDecl *ID = C->getClassInterface()) + if (ObjCImplDecl *IMP = ID->getImplementation()) { + for (ObjCImplementationDecl::instmeth_iterator + I = IMP->instmeth_begin(), E = IMP->instmeth_end(); I!=E; ++I) + InsMap.insert((*I)->getSelector()); + } + DiagnoseUnimplementedProperties(S, IMPDecl, CDecl, InsMap); + } + } else + assert(false && "invalid ObjCContainerDecl type."); +} + +/// ActOnForwardClassDeclaration - +Action::DeclPtrTy +Sema::ActOnForwardClassDeclaration(SourceLocation AtClassLoc, + IdentifierInfo **IdentList, + SourceLocation *IdentLocs, + unsigned NumElts) { + llvm::SmallVector<ObjCInterfaceDecl*, 32> Interfaces; + + for (unsigned i = 0; i != NumElts; ++i) { + // Check for another declaration kind with the same name. + NamedDecl *PrevDecl + = LookupSingleName(TUScope, IdentList[i], IdentLocs[i], + LookupOrdinaryName, ForRedeclaration); + if (PrevDecl && PrevDecl->isTemplateParameter()) { + // Maybe we will complain about the shadowed template parameter. + DiagnoseTemplateParameterShadow(AtClassLoc, PrevDecl); + // Just pretend that we didn't see the previous declaration. + PrevDecl = 0; + } + + if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) { + // GCC apparently allows the following idiom: + // + // typedef NSObject < XCElementTogglerP > XCElementToggler; + // @class XCElementToggler; + // + // FIXME: Make an extension? + TypedefDecl *TDD = dyn_cast<TypedefDecl>(PrevDecl); + if (!TDD || !TDD->getUnderlyingType()->isObjCObjectType()) { + Diag(AtClassLoc, diag::err_redefinition_different_kind) << IdentList[i]; + Diag(PrevDecl->getLocation(), diag::note_previous_definition); + } else { + // a forward class declaration matching a typedef name of a class refers + // to the underlying class. + if (const ObjCObjectType *OI = + TDD->getUnderlyingType()->getAs<ObjCObjectType>()) + PrevDecl = OI->getInterface(); + } + } + ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl); + if (!IDecl) { // Not already seen? Make a forward decl. + IDecl = ObjCInterfaceDecl::Create(Context, CurContext, AtClassLoc, + IdentList[i], IdentLocs[i], true); + + // Push the ObjCInterfaceDecl on the scope chain but do *not* add it to + // the current DeclContext. This prevents clients that walk DeclContext + // from seeing the imaginary ObjCInterfaceDecl until it is actually + // declared later (if at all). We also take care to explicitly make + // sure this declaration is visible for name lookup. + PushOnScopeChains(IDecl, TUScope, false); + CurContext->makeDeclVisibleInContext(IDecl, true); + } + + Interfaces.push_back(IDecl); + } + + assert(Interfaces.size() == NumElts); + ObjCClassDecl *CDecl = ObjCClassDecl::Create(Context, CurContext, AtClassLoc, + Interfaces.data(), IdentLocs, + Interfaces.size()); + CurContext->addDecl(CDecl); + CheckObjCDeclScope(CDecl); + return DeclPtrTy::make(CDecl); +} + + +/// MatchTwoMethodDeclarations - Checks that two methods have matching type and +/// returns true, or false, accordingly. +/// TODO: Handle protocol list; such as id<p1,p2> in type comparisons +bool Sema::MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, + const ObjCMethodDecl *PrevMethod, + bool matchBasedOnSizeAndAlignment) { + QualType T1 = Context.getCanonicalType(Method->getResultType()); + QualType T2 = Context.getCanonicalType(PrevMethod->getResultType()); + + if (T1 != T2) { + // The result types are different. + if (!matchBasedOnSizeAndAlignment) + return false; + // Incomplete types don't have a size and alignment. + if (T1->isIncompleteType() || T2->isIncompleteType()) + return false; + // Check is based on size and alignment. + if (Context.getTypeInfo(T1) != Context.getTypeInfo(T2)) + return false; + } + + ObjCMethodDecl::param_iterator ParamI = Method->param_begin(), + E = Method->param_end(); + ObjCMethodDecl::param_iterator PrevI = PrevMethod->param_begin(); + + for (; ParamI != E; ++ParamI, ++PrevI) { + assert(PrevI != PrevMethod->param_end() && "Param mismatch"); + T1 = Context.getCanonicalType((*ParamI)->getType()); + T2 = Context.getCanonicalType((*PrevI)->getType()); + if (T1 != T2) { + // The result types are different. + if (!matchBasedOnSizeAndAlignment) + return false; + // Incomplete types don't have a size and alignment. + if (T1->isIncompleteType() || T2->isIncompleteType()) + return false; + // Check is based on size and alignment. + if (Context.getTypeInfo(T1) != Context.getTypeInfo(T2)) + return false; + } + } + return true; +} + +/// \brief Read the contents of the instance and factory method pools +/// for a given selector from external storage. +/// +/// This routine should only be called once, when neither the instance +/// nor the factory method pool has an entry for this selector. +Sema::MethodPool::iterator Sema::ReadMethodPool(Selector Sel, + bool isInstance) { + assert(ExternalSource && "We need an external AST source"); + assert(InstanceMethodPool.find(Sel) == InstanceMethodPool.end() && + "Selector data already loaded into the instance method pool"); + assert(FactoryMethodPool.find(Sel) == FactoryMethodPool.end() && + "Selector data already loaded into the factory method pool"); + + // Read the method list from the external source. + std::pair<ObjCMethodList, ObjCMethodList> Methods + = ExternalSource->ReadMethodPool(Sel); + + if (isInstance) { + if (Methods.second.Method) + FactoryMethodPool[Sel] = Methods.second; + return InstanceMethodPool.insert(std::make_pair(Sel, Methods.first)).first; + } + + if (Methods.first.Method) + InstanceMethodPool[Sel] = Methods.first; + + return FactoryMethodPool.insert(std::make_pair(Sel, Methods.second)).first; +} + +void Sema::AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method) { + llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos + = InstanceMethodPool.find(Method->getSelector()); + if (Pos == InstanceMethodPool.end()) { + if (ExternalSource && !FactoryMethodPool.count(Method->getSelector())) + Pos = ReadMethodPool(Method->getSelector(), /*isInstance=*/true); + else + Pos = InstanceMethodPool.insert(std::make_pair(Method->getSelector(), + ObjCMethodList())).first; + } + + ObjCMethodList &Entry = Pos->second; + if (Entry.Method == 0) { + // Haven't seen a method with this selector name yet - add it. + Entry.Method = Method; + Entry.Next = 0; + return; + } + + // We've seen a method with this name, see if we have already seen this type + // signature. + for (ObjCMethodList *List = &Entry; List; List = List->Next) + if (MatchTwoMethodDeclarations(Method, List->Method)) + return; + + // We have a new signature for an existing method - add it. + // This is extremely rare. Only 1% of Cocoa selectors are "overloaded". + ObjCMethodList *Mem = BumpAlloc.Allocate<ObjCMethodList>(); + Entry.Next = new (Mem) ObjCMethodList(Method, Entry.Next); +} + +// FIXME: Finish implementing -Wno-strict-selector-match. +ObjCMethodDecl *Sema::LookupInstanceMethodInGlobalPool(Selector Sel, + SourceRange R, + bool warn) { + llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos + = InstanceMethodPool.find(Sel); + if (Pos == InstanceMethodPool.end()) { + if (ExternalSource && !FactoryMethodPool.count(Sel)) + Pos = ReadMethodPool(Sel, /*isInstance=*/true); + else + return 0; + } + + ObjCMethodList &MethList = Pos->second; + bool issueWarning = false; + + if (MethList.Method && MethList.Next) { + for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next) + // This checks if the methods differ by size & alignment. + if (!MatchTwoMethodDeclarations(MethList.Method, Next->Method, true)) + issueWarning = warn; + } + if (issueWarning && (MethList.Method && MethList.Next)) { + Diag(R.getBegin(), diag::warn_multiple_method_decl) << Sel << R; + Diag(MethList.Method->getLocStart(), diag::note_using) + << MethList.Method->getSourceRange(); + for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next) + Diag(Next->Method->getLocStart(), diag::note_also_found) + << Next->Method->getSourceRange(); + } + return MethList.Method; +} + +void Sema::AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method) { + llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos + = FactoryMethodPool.find(Method->getSelector()); + if (Pos == FactoryMethodPool.end()) { + if (ExternalSource && !InstanceMethodPool.count(Method->getSelector())) + Pos = ReadMethodPool(Method->getSelector(), /*isInstance=*/false); + else + Pos = FactoryMethodPool.insert(std::make_pair(Method->getSelector(), + ObjCMethodList())).first; + } + + ObjCMethodList &FirstMethod = Pos->second; + if (!FirstMethod.Method) { + // Haven't seen a method with this selector name yet - add it. + FirstMethod.Method = Method; + FirstMethod.Next = 0; + } else { + // We've seen a method with this name, now check the type signature(s). + bool match = MatchTwoMethodDeclarations(Method, FirstMethod.Method); + + for (ObjCMethodList *Next = FirstMethod.Next; !match && Next; + Next = Next->Next) + match = MatchTwoMethodDeclarations(Method, Next->Method); + + if (!match) { + // We have a new signature for an existing method - add it. + // This is extremely rare. Only 1% of Cocoa selectors are "overloaded". + ObjCMethodList *Mem = BumpAlloc.Allocate<ObjCMethodList>(); + ObjCMethodList *OMI = new (Mem) ObjCMethodList(Method, FirstMethod.Next); + FirstMethod.Next = OMI; + } + } +} + +ObjCMethodDecl *Sema::LookupFactoryMethodInGlobalPool(Selector Sel, + SourceRange R) { + llvm::DenseMap<Selector, ObjCMethodList>::iterator Pos + = FactoryMethodPool.find(Sel); + if (Pos == FactoryMethodPool.end()) { + if (ExternalSource && !InstanceMethodPool.count(Sel)) + Pos = ReadMethodPool(Sel, /*isInstance=*/false); + else + return 0; + } + + ObjCMethodList &MethList = Pos->second; + bool issueWarning = false; + + if (MethList.Method && MethList.Next) { + for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next) + // This checks if the methods differ by size & alignment. + if (!MatchTwoMethodDeclarations(MethList.Method, Next->Method, true)) + issueWarning = true; + } + if (issueWarning && (MethList.Method && MethList.Next)) { + Diag(R.getBegin(), diag::warn_multiple_method_decl) << Sel << R; + Diag(MethList.Method->getLocStart(), diag::note_using) + << MethList.Method->getSourceRange(); + for (ObjCMethodList *Next = MethList.Next; Next; Next = Next->Next) + Diag(Next->Method->getLocStart(), diag::note_also_found) + << Next->Method->getSourceRange(); + } + return MethList.Method; +} + +/// CompareMethodParamsInBaseAndSuper - This routine compares methods with +/// identical selector names in current and its super classes and issues +/// a warning if any of their argument types are incompatible. +void Sema::CompareMethodParamsInBaseAndSuper(Decl *ClassDecl, + ObjCMethodDecl *Method, + bool IsInstance) { + ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ClassDecl); + if (ID == 0) return; + + while (ObjCInterfaceDecl *SD = ID->getSuperClass()) { + ObjCMethodDecl *SuperMethodDecl = + SD->lookupMethod(Method->getSelector(), IsInstance); + if (SuperMethodDecl == 0) { + ID = SD; + continue; + } + ObjCMethodDecl::param_iterator ParamI = Method->param_begin(), + E = Method->param_end(); + ObjCMethodDecl::param_iterator PrevI = SuperMethodDecl->param_begin(); + for (; ParamI != E; ++ParamI, ++PrevI) { + // Number of parameters are the same and is guaranteed by selector match. + assert(PrevI != SuperMethodDecl->param_end() && "Param mismatch"); + QualType T1 = Context.getCanonicalType((*ParamI)->getType()); + QualType T2 = Context.getCanonicalType((*PrevI)->getType()); + // If type of arguement of method in this class does not match its + // respective argument type in the super class method, issue warning; + if (!Context.typesAreCompatible(T1, T2)) { + Diag((*ParamI)->getLocation(), diag::ext_typecheck_base_super) + << T1 << T2; + Diag(SuperMethodDecl->getLocation(), diag::note_previous_declaration); + return; + } + } + ID = SD; + } +} + +/// DiagnoseDuplicateIvars - +/// Check for duplicate ivars in the entire class at the start of +/// @implementation. This becomes necesssary because class extension can +/// add ivars to a class in random order which will not be known until +/// class's @implementation is seen. +void Sema::DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, + ObjCInterfaceDecl *SID) { + for (ObjCInterfaceDecl::ivar_iterator IVI = ID->ivar_begin(), + IVE = ID->ivar_end(); IVI != IVE; ++IVI) { + ObjCIvarDecl* Ivar = (*IVI); + if (Ivar->isInvalidDecl()) + continue; + if (IdentifierInfo *II = Ivar->getIdentifier()) { + ObjCIvarDecl* prevIvar = SID->lookupInstanceVariable(II); + if (prevIvar) { + Diag(Ivar->getLocation(), diag::err_duplicate_member) << II; + Diag(prevIvar->getLocation(), diag::note_previous_declaration); + Ivar->setInvalidDecl(); + } + } + } +} + +// Note: For class/category implemenations, allMethods/allProperties is +// always null. +void Sema::ActOnAtEnd(Scope *S, SourceRange AtEnd, + DeclPtrTy classDecl, + DeclPtrTy *allMethods, unsigned allNum, + DeclPtrTy *allProperties, unsigned pNum, + DeclGroupPtrTy *allTUVars, unsigned tuvNum) { + Decl *ClassDecl = classDecl.getAs<Decl>(); + + // FIXME: If we don't have a ClassDecl, we have an error. We should consider + // always passing in a decl. If the decl has an error, isInvalidDecl() + // should be true. + if (!ClassDecl) + return; + + bool isInterfaceDeclKind = + isa<ObjCInterfaceDecl>(ClassDecl) || isa<ObjCCategoryDecl>(ClassDecl) + || isa<ObjCProtocolDecl>(ClassDecl); + bool checkIdenticalMethods = isa<ObjCImplementationDecl>(ClassDecl); + + if (!isInterfaceDeclKind && AtEnd.isInvalid()) { + // FIXME: This is wrong. We shouldn't be pretending that there is + // an '@end' in the declaration. + SourceLocation L = ClassDecl->getLocation(); + AtEnd.setBegin(L); + AtEnd.setEnd(L); + Diag(L, diag::warn_missing_atend); + } + + DeclContext *DC = dyn_cast<DeclContext>(ClassDecl); + + // FIXME: Remove these and use the ObjCContainerDecl/DeclContext. + llvm::DenseMap<Selector, const ObjCMethodDecl*> InsMap; + llvm::DenseMap<Selector, const ObjCMethodDecl*> ClsMap; + + for (unsigned i = 0; i < allNum; i++ ) { + ObjCMethodDecl *Method = + cast_or_null<ObjCMethodDecl>(allMethods[i].getAs<Decl>()); + + if (!Method) continue; // Already issued a diagnostic. + if (Method->isInstanceMethod()) { + /// Check for instance method of the same name with incompatible types + const ObjCMethodDecl *&PrevMethod = InsMap[Method->getSelector()]; + bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod) + : false; + if ((isInterfaceDeclKind && PrevMethod && !match) + || (checkIdenticalMethods && match)) { + Diag(Method->getLocation(), diag::err_duplicate_method_decl) + << Method->getDeclName(); + Diag(PrevMethod->getLocation(), diag::note_previous_declaration); + } else { + DC->addDecl(Method); + InsMap[Method->getSelector()] = Method; + /// The following allows us to typecheck messages to "id". + AddInstanceMethodToGlobalPool(Method); + // verify that the instance method conforms to the same definition of + // parent methods if it shadows one. + CompareMethodParamsInBaseAndSuper(ClassDecl, Method, true); + } + } else { + /// Check for class method of the same name with incompatible types + const ObjCMethodDecl *&PrevMethod = ClsMap[Method->getSelector()]; + bool match = PrevMethod ? MatchTwoMethodDeclarations(Method, PrevMethod) + : false; + if ((isInterfaceDeclKind && PrevMethod && !match) + || (checkIdenticalMethods && match)) { + Diag(Method->getLocation(), diag::err_duplicate_method_decl) + << Method->getDeclName(); + Diag(PrevMethod->getLocation(), diag::note_previous_declaration); + } else { + DC->addDecl(Method); + ClsMap[Method->getSelector()] = Method; + /// The following allows us to typecheck messages to "Class". + AddFactoryMethodToGlobalPool(Method); + // verify that the class method conforms to the same definition of + // parent methods if it shadows one. + CompareMethodParamsInBaseAndSuper(ClassDecl, Method, false); + } + } + } + if (ObjCInterfaceDecl *I = dyn_cast<ObjCInterfaceDecl>(ClassDecl)) { + // Compares properties declared in this class to those of its + // super class. + ComparePropertiesInBaseAndSuper(I); + CompareProperties(I, DeclPtrTy::make(I)); + } else if (ObjCCategoryDecl *C = dyn_cast<ObjCCategoryDecl>(ClassDecl)) { + // Categories are used to extend the class by declaring new methods. + // By the same token, they are also used to add new properties. No + // need to compare the added property to those in the class. + + // Compare protocol properties with those in category + CompareProperties(C, DeclPtrTy::make(C)); + if (C->IsClassExtension()) + DiagnoseClassExtensionDupMethods(C, C->getClassInterface()); + } + if (ObjCContainerDecl *CDecl = dyn_cast<ObjCContainerDecl>(ClassDecl)) { + if (CDecl->getIdentifier()) + // ProcessPropertyDecl is responsible for diagnosing conflicts with any + // user-defined setter/getter. It also synthesizes setter/getter methods + // and adds them to the DeclContext and global method pools. + for (ObjCContainerDecl::prop_iterator I = CDecl->prop_begin(), + E = CDecl->prop_end(); + I != E; ++I) + ProcessPropertyDecl(*I, CDecl); + CDecl->setAtEndRange(AtEnd); + } + if (ObjCImplementationDecl *IC=dyn_cast<ObjCImplementationDecl>(ClassDecl)) { + IC->setAtEndRange(AtEnd); + if (ObjCInterfaceDecl* IDecl = IC->getClassInterface()) { + if (LangOpts.ObjCNonFragileABI2) + DefaultSynthesizeProperties(S, IC, IDecl); + ImplMethodsVsClassMethods(S, IC, IDecl); + AtomicPropertySetterGetterRules(IC, IDecl); + if (LangOpts.ObjCNonFragileABI2) + while (IDecl->getSuperClass()) { + DiagnoseDuplicateIvars(IDecl, IDecl->getSuperClass()); + IDecl = IDecl->getSuperClass(); + } + } + SetIvarInitializers(IC); + } else if (ObjCCategoryImplDecl* CatImplClass = + dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) { + CatImplClass->setAtEndRange(AtEnd); + + // Find category interface decl and then check that all methods declared + // in this interface are implemented in the category @implementation. + if (ObjCInterfaceDecl* IDecl = CatImplClass->getClassInterface()) { + for (ObjCCategoryDecl *Categories = IDecl->getCategoryList(); + Categories; Categories = Categories->getNextClassCategory()) { + if (Categories->getIdentifier() == CatImplClass->getIdentifier()) { + ImplMethodsVsClassMethods(S, CatImplClass, Categories); + break; + } + } + } + } + if (isInterfaceDeclKind) { + // Reject invalid vardecls. + for (unsigned i = 0; i != tuvNum; i++) { + DeclGroupRef DG = allTUVars[i].getAsVal<DeclGroupRef>(); + for (DeclGroupRef::iterator I = DG.begin(), E = DG.end(); I != E; ++I) + if (VarDecl *VDecl = dyn_cast<VarDecl>(*I)) { + if (!VDecl->hasExternalStorage()) + Diag(VDecl->getLocation(), diag::err_objc_var_decl_inclass); + } + } + } +} + + +/// CvtQTToAstBitMask - utility routine to produce an AST bitmask for +/// objective-c's type qualifier from the parser version of the same info. +static Decl::ObjCDeclQualifier +CvtQTToAstBitMask(ObjCDeclSpec::ObjCDeclQualifier PQTVal) { + Decl::ObjCDeclQualifier ret = Decl::OBJC_TQ_None; + if (PQTVal & ObjCDeclSpec::DQ_In) + ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_In); + if (PQTVal & ObjCDeclSpec::DQ_Inout) + ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Inout); + if (PQTVal & ObjCDeclSpec::DQ_Out) + ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Out); + if (PQTVal & ObjCDeclSpec::DQ_Bycopy) + ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Bycopy); + if (PQTVal & ObjCDeclSpec::DQ_Byref) + ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Byref); + if (PQTVal & ObjCDeclSpec::DQ_Oneway) + ret = (Decl::ObjCDeclQualifier)(ret | Decl::OBJC_TQ_Oneway); + + return ret; +} + +static inline +bool containsInvalidMethodImplAttribute(const AttributeList *A) { + // The 'ibaction' attribute is allowed on method definitions because of + // how the IBAction macro is used on both method declarations and definitions. + // If the method definitions contains any other attributes, return true. + while (A && A->getKind() == AttributeList::AT_IBAction) + A = A->getNext(); + return A != NULL; +} + +Sema::DeclPtrTy Sema::ActOnMethodDeclaration( + SourceLocation MethodLoc, SourceLocation EndLoc, + tok::TokenKind MethodType, DeclPtrTy classDecl, + ObjCDeclSpec &ReturnQT, TypeTy *ReturnType, + Selector Sel, + // optional arguments. The number of types/arguments is obtained + // from the Sel.getNumArgs(). + ObjCArgInfo *ArgInfo, + DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args + AttributeList *AttrList, tok::ObjCKeywordKind MethodDeclKind, + bool isVariadic) { + Decl *ClassDecl = classDecl.getAs<Decl>(); + + // Make sure we can establish a context for the method. + if (!ClassDecl) { + Diag(MethodLoc, diag::error_missing_method_context); + getLabelMap().clear(); + return DeclPtrTy(); + } + QualType resultDeclType; + + TypeSourceInfo *ResultTInfo = 0; + if (ReturnType) { + resultDeclType = GetTypeFromParser(ReturnType, &ResultTInfo); + + // Methods cannot return interface types. All ObjC objects are + // passed by reference. + if (resultDeclType->isObjCObjectType()) { + Diag(MethodLoc, diag::err_object_cannot_be_passed_returned_by_value) + << 0 << resultDeclType; + return DeclPtrTy(); + } + } else // get the type for "id". + resultDeclType = Context.getObjCIdType(); + + ObjCMethodDecl* ObjCMethod = + ObjCMethodDecl::Create(Context, MethodLoc, EndLoc, Sel, resultDeclType, + ResultTInfo, + cast<DeclContext>(ClassDecl), + MethodType == tok::minus, isVariadic, + false, + MethodDeclKind == tok::objc_optional ? + ObjCMethodDecl::Optional : + ObjCMethodDecl::Required); + + llvm::SmallVector<ParmVarDecl*, 16> Params; + + for (unsigned i = 0, e = Sel.getNumArgs(); i != e; ++i) { + QualType ArgType; + TypeSourceInfo *DI; + + if (ArgInfo[i].Type == 0) { + ArgType = Context.getObjCIdType(); + DI = 0; + } else { + ArgType = GetTypeFromParser(ArgInfo[i].Type, &DI); + // Perform the default array/function conversions (C99 6.7.5.3p[7,8]). + ArgType = adjustParameterType(ArgType); + } + + ParmVarDecl* Param + = ParmVarDecl::Create(Context, ObjCMethod, ArgInfo[i].NameLoc, + ArgInfo[i].Name, ArgType, DI, + VarDecl::None, VarDecl::None, 0); + + if (ArgType->isObjCObjectType()) { + Diag(ArgInfo[i].NameLoc, + diag::err_object_cannot_be_passed_returned_by_value) + << 1 << ArgType; + Param->setInvalidDecl(); + } + + Param->setObjCDeclQualifier( + CvtQTToAstBitMask(ArgInfo[i].DeclSpec.getObjCDeclQualifier())); + + // Apply the attributes to the parameter. + ProcessDeclAttributeList(TUScope, Param, ArgInfo[i].ArgAttrs); + + Params.push_back(Param); + } + + for (unsigned i = 0, e = CNumArgs; i != e; ++i) { + ParmVarDecl *Param = CParamInfo[i].Param.getAs<ParmVarDecl>(); + QualType ArgType = Param->getType(); + if (ArgType.isNull()) + ArgType = Context.getObjCIdType(); + else + // Perform the default array/function conversions (C99 6.7.5.3p[7,8]). + ArgType = adjustParameterType(ArgType); + if (ArgType->isObjCObjectType()) { + Diag(Param->getLocation(), + diag::err_object_cannot_be_passed_returned_by_value) + << 1 << ArgType; + Param->setInvalidDecl(); + } + Param->setDeclContext(ObjCMethod); + IdResolver.RemoveDecl(Param); + Params.push_back(Param); + } + + ObjCMethod->setMethodParams(Context, Params.data(), Params.size(), + Sel.getNumArgs()); + ObjCMethod->setObjCDeclQualifier( + CvtQTToAstBitMask(ReturnQT.getObjCDeclQualifier())); + const ObjCMethodDecl *PrevMethod = 0; + + if (AttrList) + ProcessDeclAttributeList(TUScope, ObjCMethod, AttrList); + + const ObjCMethodDecl *InterfaceMD = 0; + + // For implementations (which can be very "coarse grain"), we add the + // method now. This allows the AST to implement lookup methods that work + // incrementally (without waiting until we parse the @end). It also allows + // us to flag multiple declaration errors as they occur. + if (ObjCImplementationDecl *ImpDecl = + dyn_cast<ObjCImplementationDecl>(ClassDecl)) { + if (MethodType == tok::minus) { + PrevMethod = ImpDecl->getInstanceMethod(Sel); + ImpDecl->addInstanceMethod(ObjCMethod); + } else { + PrevMethod = ImpDecl->getClassMethod(Sel); + ImpDecl->addClassMethod(ObjCMethod); + } + InterfaceMD = ImpDecl->getClassInterface()->getMethod(Sel, + MethodType == tok::minus); + if (containsInvalidMethodImplAttribute(AttrList)) + Diag(EndLoc, diag::warn_attribute_method_def); + } else if (ObjCCategoryImplDecl *CatImpDecl = + dyn_cast<ObjCCategoryImplDecl>(ClassDecl)) { + if (MethodType == tok::minus) { + PrevMethod = CatImpDecl->getInstanceMethod(Sel); + CatImpDecl->addInstanceMethod(ObjCMethod); + } else { + PrevMethod = CatImpDecl->getClassMethod(Sel); + CatImpDecl->addClassMethod(ObjCMethod); + } + if (containsInvalidMethodImplAttribute(AttrList)) + Diag(EndLoc, diag::warn_attribute_method_def); + } + if (PrevMethod) { + // You can never have two method definitions with the same name. + Diag(ObjCMethod->getLocation(), diag::err_duplicate_method_decl) + << ObjCMethod->getDeclName(); + Diag(PrevMethod->getLocation(), diag::note_previous_declaration); + } + + // If the interface declared this method, and it was deprecated there, + // mark it deprecated here. + if (InterfaceMD && InterfaceMD->hasAttr<DeprecatedAttr>()) + ObjCMethod->addAttr(::new (Context) DeprecatedAttr()); + + return DeclPtrTy::make(ObjCMethod); +} + +bool Sema::CheckObjCDeclScope(Decl *D) { + if (isa<TranslationUnitDecl>(CurContext->getLookupContext())) + return false; + + Diag(D->getLocation(), diag::err_objc_decls_may_only_appear_in_global_scope); + D->setInvalidDecl(); + + return true; +} + +/// Called whenever @defs(ClassName) is encountered in the source. Inserts the +/// instance variables of ClassName into Decls. +void Sema::ActOnDefs(Scope *S, DeclPtrTy TagD, SourceLocation DeclStart, + IdentifierInfo *ClassName, + llvm::SmallVectorImpl<DeclPtrTy> &Decls) { + // Check that ClassName is a valid class + ObjCInterfaceDecl *Class = getObjCInterfaceDecl(ClassName, DeclStart); + if (!Class) { + Diag(DeclStart, diag::err_undef_interface) << ClassName; + return; + } + if (LangOpts.ObjCNonFragileABI) { + Diag(DeclStart, diag::err_atdef_nonfragile_interface); + return; + } + + // Collect the instance variables + llvm::SmallVector<FieldDecl*, 32> RecFields; + Context.CollectObjCIvars(Class, RecFields); + // For each ivar, create a fresh ObjCAtDefsFieldDecl. + for (unsigned i = 0; i < RecFields.size(); i++) { + FieldDecl* ID = RecFields[i]; + RecordDecl *Record = dyn_cast<RecordDecl>(TagD.getAs<Decl>()); + Decl *FD = ObjCAtDefsFieldDecl::Create(Context, Record, ID->getLocation(), + ID->getIdentifier(), ID->getType(), + ID->getBitWidth()); + Decls.push_back(Sema::DeclPtrTy::make(FD)); + } + + // Introduce all of these fields into the appropriate scope. + for (llvm::SmallVectorImpl<DeclPtrTy>::iterator D = Decls.begin(); + D != Decls.end(); ++D) { + FieldDecl *FD = cast<FieldDecl>(D->getAs<Decl>()); + if (getLangOptions().CPlusPlus) + PushOnScopeChains(cast<FieldDecl>(FD), S); + else if (RecordDecl *Record = dyn_cast<RecordDecl>(TagD.getAs<Decl>())) + Record->addDecl(FD); + } +} + +/// \brief Build a type-check a new Objective-C exception variable declaration. +VarDecl *Sema::BuildObjCExceptionDecl(TypeSourceInfo *TInfo, + QualType T, + IdentifierInfo *Name, + SourceLocation NameLoc, + bool Invalid) { + // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage + // duration shall not be qualified by an address-space qualifier." + // Since all parameters have automatic store duration, they can not have + // an address space. + if (T.getAddressSpace() != 0) { + Diag(NameLoc, diag::err_arg_with_address_space); + Invalid = true; + } + + // An @catch parameter must be an unqualified object pointer type; + // FIXME: Recover from "NSObject foo" by inserting the * in "NSObject *foo"? + if (Invalid) { + // Don't do any further checking. + } else if (T->isDependentType()) { + // Okay: we don't know what this type will instantiate to. + } else if (!T->isObjCObjectPointerType()) { + Invalid = true; + Diag(NameLoc ,diag::err_catch_param_not_objc_type); + } else if (T->isObjCQualifiedIdType()) { + Invalid = true; + Diag(NameLoc, diag::err_illegal_qualifiers_on_catch_parm); + } + + VarDecl *New = VarDecl::Create(Context, CurContext, NameLoc, Name, T, TInfo, + VarDecl::None, VarDecl::None); + New->setExceptionVariable(true); + + if (Invalid) + New->setInvalidDecl(); + return New; +} + +Sema::DeclPtrTy Sema::ActOnObjCExceptionDecl(Scope *S, Declarator &D) { + const DeclSpec &DS = D.getDeclSpec(); + + // We allow the "register" storage class on exception variables because + // GCC did, but we drop it completely. Any other storage class is an error. + if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { + Diag(DS.getStorageClassSpecLoc(), diag::warn_register_objc_catch_parm) + << FixItHint::CreateRemoval(SourceRange(DS.getStorageClassSpecLoc())); + } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { + Diag(DS.getStorageClassSpecLoc(), diag::err_storage_spec_on_catch_parm) + << DS.getStorageClassSpec(); + } + if (D.getDeclSpec().isThreadSpecified()) + Diag(D.getDeclSpec().getThreadSpecLoc(), diag::err_invalid_thread); + D.getMutableDeclSpec().ClearStorageClassSpecs(); + + DiagnoseFunctionSpecifiers(D); + + // Check that there are no default arguments inside the type of this + // exception object (C++ only). + if (getLangOptions().CPlusPlus) + CheckExtraCXXDefaultArguments(D); + + TypeSourceInfo *TInfo = 0; + TagDecl *OwnedDecl = 0; + QualType ExceptionType = GetTypeForDeclarator(D, S, &TInfo, &OwnedDecl); + + if (getLangOptions().CPlusPlus && OwnedDecl && OwnedDecl->isDefinition()) { + // Objective-C++: Types shall not be defined in exception types. + Diag(OwnedDecl->getLocation(), diag::err_type_defined_in_param_type) + << Context.getTypeDeclType(OwnedDecl); + } + + VarDecl *New = BuildObjCExceptionDecl(TInfo, ExceptionType, D.getIdentifier(), + D.getIdentifierLoc(), + D.isInvalidType()); + + // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). + if (D.getCXXScopeSpec().isSet()) { + Diag(D.getIdentifierLoc(), diag::err_qualified_objc_catch_parm) + << D.getCXXScopeSpec().getRange(); + New->setInvalidDecl(); + } + + // Add the parameter declaration into this scope. + S->AddDecl(DeclPtrTy::make(New)); + if (D.getIdentifier()) + IdResolver.AddDecl(New); + + ProcessDeclAttributes(S, New, D); + + if (New->hasAttr<BlocksAttr>()) + Diag(New->getLocation(), diag::err_block_on_nonlocal); + return DeclPtrTy::make(New); +} + +/// CollectIvarsToConstructOrDestruct - Collect those ivars which require +/// initialization. +void Sema::CollectIvarsToConstructOrDestruct(const ObjCInterfaceDecl *OI, + llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { + for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), + E = OI->ivar_end(); I != E; ++I) { + ObjCIvarDecl *Iv = (*I); + QualType QT = Context.getBaseElementType(Iv->getType()); + if (QT->isRecordType()) + Ivars.push_back(*I); + } + + // Find ivars to construct/destruct in class extension. + if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { + for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), + E = CDecl->ivar_end(); I != E; ++I) { + ObjCIvarDecl *Iv = (*I); + QualType QT = Context.getBaseElementType(Iv->getType()); + if (QT->isRecordType()) + Ivars.push_back(*I); + } + } + + // Also add any ivar defined in this class's implementation. This + // includes synthesized ivars. + if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { + for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), + E = ImplDecl->ivar_end(); I != E; ++I) { + ObjCIvarDecl *Iv = (*I); + QualType QT = Context.getBaseElementType(Iv->getType()); + if (QT->isRecordType()) + Ivars.push_back(*I); + } + } +} + +void ObjCImplementationDecl::setIvarInitializers(ASTContext &C, + CXXBaseOrMemberInitializer ** initializers, + unsigned numInitializers) { + if (numInitializers > 0) { + NumIvarInitializers = numInitializers; + CXXBaseOrMemberInitializer **ivarInitializers = + new (C) CXXBaseOrMemberInitializer*[NumIvarInitializers]; + memcpy(ivarInitializers, initializers, + numInitializers * sizeof(CXXBaseOrMemberInitializer*)); + IvarInitializers = ivarInitializers; + } +} + |
